While Barbie might look like a ditz, Benson wanted to make sure her personality had depth.

"My feeling was to make her smart and loyal and passionate," says Benson."I wanted to make real. Not plastic. She has this external look. Which is not me and I don't think Barbie sees herself this way."

Indeed, Barbie -- while no Buzz Lightyear -- is one of the stand-up heroes of the movie.

Ironically, Benson found out after she did her voice work that the Pixar creators placed the iconic doll right back into the 1980s. "Barbie wears the same workout gear that my original Barbie wore in the 80s," says Benson. "That was the same outfit I wore, with the legwarmers."

So groovy.

Published at 3:18 PM EDT on Jun 16, 2010 | Updated at 2:41 PM EDT on May 30, 2012